HTTPfy

Port 4669 (eportcommdata)

IANA assigns port 4669 to eportcommdata: E-Port Data Service.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
eportcommdata TCP E-Port Data Service Robert Shaffer -
eportcommdata UDP E-Port Data Service Robert Shaffer -

Registry dates for this port: registered 2006-02.

Check what is listening on port 4669

Linux: is anything listening on TCP 4669?
sudo ss -tlnp 'sport = :4669'
Linux: UDP 4669
sudo ss -ulnp 'sport = :4669'
Linux / macOS: which process owns the port
sudo lsof -nP -i :4669
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':4669 '
Windows (Command Prompt)
netstat -ano | findstr :4669
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4669 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 4669
From Windows
Test-NetConnection HOST -Port 4669
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 4669

Block port 4669 in the firewall

ufw
sudo ufw deny 4669/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 4669 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 4669 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 4669' -Direction Inbound -Protocol TCP -LocalPort 4669 -Action Block
ufw
sudo ufw deny 4669/udp
iptables
sudo iptables -A INPUT -p udp --dport 4669 -j DROP
nftables
sudo nft add rule inet filter input udp dport 4669 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 4669' -Direction Inbound -Protocol UDP -LocalPort 4669 -Action Block

Related ports

4667mmacomm4668mmaeds4670light4671acter

All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.